Stadium: Court 3 Round: 62
| ITF Women Toyota Qual | 2017/11/12 00:30 | Haruna Arakawa v Yukina Saigo | 6-2,6-1 |
| ITF Women Kofu Qual | 2017/03/25 03:30 | Haruna Arakawa v Yukina Saigo | 6-4,6-7,7-6 |
| ITF Women Osaka Qual | 2018/04/08 02:00 | Haruna Arakawa v Ying Zhang | 7-5,6-1 |
| ITF Women Kashiwa | 2018/04/03 01:00 | Lin Zhu v Haruna Arakawa | 6-0,6-1 |
| ITF Women Kofu Qual | 2018/03/24 00:30 | Ayumi Koshiishi v Haruna Arakawa | 7-5,6-4 |
| ITF Women Nishi-Tama | 2018/03/20 04:50 | Haruna Arakawa v Kanako Morisaki | 5-7,2-6 |
| ITF Women Toyota Qual | 2018/03/10 03:00 | Miyabi Inoue v Haruna Arakawa | 6-3,6-0 |
| ITF Women Yokohama Qual | 2018/03/04 05:30 | Katherine Sebov v Haruna Arakawa | 6-1,7-6 |
| ITF Women Antalya | 2018/02/15 08:35 | Haruna Arakawa v Rebecca Marino | 1-6,3-6 |
| ITF Women Antalya | 2018/02/07 08:30 | Raluca Georgiana Serban v Haruna Arakawa | 6-4,6-1 |
| ITF Women Osaka Qual | 2018/04/08 01:00 | Yukina Saigo v Alina Silich | 7-6,6-4 |
| ITF Women Kofu Qual | 2018/03/24 00:30 | Karin Terami v Yukina Saigo | 6-1,0-6,6-4 |
| ITF Women Nishi-Tama | 2018/03/20 05:00 | Sarah Rebecca Sekulic v Yukina Saigo | 6-0,6-0 |
| ITF Women Nishi-Tama | 2018/03/19 01:00 | Yukina Saigo v Mami Hasegawa | 3-6,4-6 |
| ITF Women Nishi-Tama | 2018/03/17 01:00 | Yukina Saigo v Minami Shuto | 6-3,6-1 |
| ITF Women Mallorca | 2018/02/27 09:55 | Yukina Saigo v Estrella Cabeza Candela | 0-6,1-6 |
| ITF Women Mallorca | 2018/02/25 08:30 | Yukina Saigo v Daniella Medvedeva | 6-4,4-6,6-2 |
| ITF Women Mallorca | 2018/02/23 09:40 | Alexandra Perper v Yukina Saigo | 6-3,6-1 |